AMiBA wideband analog correlator

Abstract

A wideband analog correlator has been constructed for the Yuan-Tseh Lee Array for Microwave Background Anisotropy. Lag correlators using analog multipliers provide large bandwidth and moderate frequency resolution. Broadband intermediate frequency distribution, back-end signal processing, and control are described. Operating conditions for optimum sensitivity and linearity are discussed. From observations, a large effective bandwidth of around 10GHz has been shown to provide sufficient sensitivity for detecting cosmic microwave background variations. © 2010. The American Astronomical Society. All rights reserved.